Scoliosis Everyone's spine has curves. These curves produce the normal rounding of the shoulder and the sway of the lower back. A spine with scoliosis has abnormal curves with a rotational deformity. This means that the spine turns on its axis like a corkscrew. Scoliosis is a curvature of the spine which may have its onset in infancy but is most frequently discovered in adolescence. It is more common in females by a 2:1 ratio. However, when curves in excess of 30 degrees are evaluated, females are more frequently affected by a ration of approximately10:1. The cause of the most common form of scoliosis; idiopathic scoliosis. is unknown, but there have been